One is a bereaved dog from the down-and-out branch of the Lou family, and the other is a demon spirit that has no physical body between the two worlds of demons and ghosts. How can they carry the trust of their parents, make a comeback despite the rejection of millions of people, and return a hundred times the pain to the person who hurt them in the first place? How to kill the demon spirit born at the same time as himself under oppression, devour his brothers and sisters, and become the king who finally inherits the demon clan?